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ExxonMobil Baytown Frame 6BRecent Worklist Items
Frame 6B User Group MeetingJune 6-9, 2011Greg Polasek
Baytown Cogen Vital Stats
• Located in Baytown, TX (about 25 miles east of Houston)• Supplies power & steam to Baytown Refinery &
Chemical Complex
• 3 PG-6541 Units• Commissioned in 1989• Base load, NG fuel, NOx steam injection• Between 175k – 182k fired hours
Baytown Olefins PlantRecent Work
• Fiber Optic Flame Detection
• Exhaust Plenum Replacement
• IGV LVDT Relocation
• HEPA Filtration
• Load Gear Issues
Before / After Installation
Service:
Hank MarsmanBridgewater NJ800-743-1433
Fiber Optic Scanner
BFI CFC3000UV1• Rated for temperatures up to 392°F, briefly to 572°F• Lengths up to 33 feet
Baytown Olefins PlantRecent Work
• Fiber Optic Flame Detection
• Exhaust Plenum Replacement
• IGV LVDT Relocation
• HEPA Filtration
• Load Gear Issues
Side / Side Comparison
400200
300150
300150
300150
200140
400200
550250
300300
All temperatures in degF.
Surface behind protective shield is 600 degF on original plenum. No
shield on new plenum
Service:
Fred CollinsworthTulsa OK918-274-2344
Frame 6B Exhaust Plenum
4-Piece Plenum• 2-piece box• Side Cover• Cowl• Expansion Joint• 18 Thermocouples
Baytown Olefins PlantRecent Work
• Fiber Optic Flame Detection
• Exhaust Plenum Replacement
• IGV LVDT Relocation
• HEPA Filtration
• Load Gear Issues
Service:
Pete YoderOil Quip225-751-9838
LVDT Relocation
• 3 x LVDT – medium select• Linear bearing guidance to maintain LVDT alignment of core to
housing• Improved IGV calibration (scheduling)
Baytown Olefins PlantRecent Work
• Fiber Optic Flame Detection
• Exhaust Plenum Replacement
• IGV LVDT Relocation
• HEPA Filtration
• Load Gear Issues
SGT-02 GORE Filtration Results
20
22
24
26
28
30
32
34
36
Jun-08 Dec-08 Jul-09 Jan-10 Aug-10 Feb-11
MW
86.0%
87.0%
88.0%
89.0%
90.0%
91.0%
92.0%
93.0%
94.0%
95.0%
96.0%
Eff
icie
ncy
2008 MW 2009 MW 2010 MW 2008 Eff 2009 Eff 2010 Eff Linear (2010 Eff)Linear (2009 Eff) Linear (2008 Eff) Linear (2008 MW) Linear (2009 MW) Linear (2010 MW)
Service:
Steve Medvetz
410-506-3323
Inlet Filtration
GORE H12 HEPA Filtration since 2009• Consistent performance increase of 1.5 MW-hr on Ave• Steady MW-hr production throughout entire 12 month operation• Filters replaced annually, exploring options of increasing duration• Installed in all 3 F6B machines at BOP• Do I even need to crankwash annually anymore ? ? ?
Baytown Olefins PlantRecent Work
• Fiber Optic Flame Detection
• Exhaust Plenum Replacement
• IGV LVDT Relocation
• HEPA Filtration
• Load Gear Issues
SGT-01 Major Inspection
• Scheduled gearbox overhaul
• No issues found, reused all components
• Found high shaft movement & velocity
SGT-01 – Gearbox RCFA
• 19 Possible Root Causes – Shaft rub on laby seals (oil seals) ?– Bearings pinched (crush) ?– Looseness (bolts, bearings) ?
• Checks on Reassembly (clean housings)– Bearing ID (installed without rotors)– Seal ID’s, Rotor OD’s
SGT-01 – Disassembly
• Splitline sealant – Black RTV, as prescribed by Philly– Questioned specific QC around application
• Saw blade used to apply• Spread evenly• Experience within GE & Philly
SGT-02 Annual Inspection
• Standard visual NDE thru inspection door
• Wear found at root & tips on blind side of pinion
• No vibration problems found, continue to monitor
